| Name | Games | Teams/Playoffs | NL | AL | IL? | Bal? |
|---|---|---|---|---|---|---|
| Standard WIS Format | 162 | 24/8 | 4/4/4 | 4/4/4 | Yes | No |
| Alternate WIS Format A | 162 | 24/2 | 12/0/0 | 12/0/0 | No | Yes |
| Alternate WIS Format B | 162 | 16/4 | 4/4/0 | 4/4/0 | No | Yes |
| Alternate WIS Format C | 162 | 12/2 | 6/0/0 | 6/0/0 | No | Yes |
| Alternate WIS Format D | 162 | 12/2 | 6/0/0 | 6/0/0 | Yes | Yes |
| Alternate WIS Format E | 162 | 16/4 | 4/4/0 | 4/4/0 | Yes | Yes |
| Alternate WIS Format F | 162 | 20/4 | 5/5/0 | 5/5/0 | Yes | Yes |
| 1901-1903 | 140 | 16/2 | 8/0/0 | 8/0/0 | No | Yes |
| 1904-1960 | 154 | 16/2 | 8/0/0 | 8/0/0 | No | Yes |
| 1961 | 162 | 18/2 | 8/0/0 | 10/0/0 | No | Yes |
| 1962-1968 | 162 | 20/2 | 10/0/0 | 10/0/0 | No | Yes |
| 1969-1976 | 162 | 24/4 | 6/6/0 | 6/6/0 | No | Yes |
| 1977-1992 | 162 | 26/4 | 6/6/0 | 7/7/0 | No | Yes |
| 1977-1993 | 162 | 28/4 | 7/7/0 | 7/7/0 | No | Yes |
| 1994-1996 | 162 | 28/8 | 5/4/5 | 5/4/5 | No | Yes |
| 1997 | 162 | 28/8 | 5/4/5 | 5/4/5 | Yes | Yes |
| 1998-2000 | 162 | 30/8 | 5/5/6 | 5/4/5 | Yes | Yes |
| 2001-2008 | 162 | 30/8 | 5/5/6 | 5/4/5 | Yes | No |
NOTE: IL - Uses Interleague Play, Bal - Uses a balanced schedule